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1999 anthro avian back_wings beak claws clenched_teeth clothed clothing crouching digitigrade feathered_wings feathers feet finger_claws full-length_portrait graphite_(artwork)greyscale gryphon herbie_bearclaw hindpaw horn male monochrome mythological_avian mythological_creature mythology paws portrait shirt signature sketch solo tail tail_tuft teeth toe_claws toothed_beak topwear traditional_media_(artwork)tuft tunic wings